From: Saurav Kashyap <skashyap@marvell.com>
Date: Mon, 11 Jan 2021 01:31:29 -0800
Subject: scsi: qla2xxx: Add error counters to debugfs node
Patch-mainline: v5.12-rc1
Git-commit: 307862e6697a153a5645c75d86682b75ea471369
References: bsc#1185491

Display error counters via debugfs node.

Link: https://lore.kernel.org/r/20210111093134.1206-3-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
 drivers/scsi/qla2xxx/qla_dfs.c |   28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

--- a/drivers/scsi/qla2xxx/qla_dfs.c
+++ b/drivers/scsi/qla2xxx/qla_dfs.c
@@ -287,6 +287,10 @@ qla_dfs_tgt_counters_show(struct seq_fil
 		core_qla_snd_status, qla_core_ret_sta_ctio, core_qla_free_cmd,
 		num_q_full_sent, num_alloc_iocb_failed, num_term_xchg_sent;
 	u16 i;
+	fc_port_t *fcport = NULL;
+
+	if (qla2x00_chip_is_down(vha))
+		return 0;
 
 	qla_core_sbt_cmd = qpair->tgt_counters.qla_core_sbt_cmd;
 	core_qla_que_buf = qpair->tgt_counters.core_qla_que_buf;
@@ -350,6 +354,30 @@ qla_dfs_tgt_counters_show(struct seq_fil
 		vha->qla_stats.qla_dif_stats.dif_ref_tag_err);
 	seq_printf(s, "DIF App tag err = %d\n",
 		vha->qla_stats.qla_dif_stats.dif_app_tag_err);
+
+	seq_puts(s, "\n");
+	seq_puts(s, "Initiator Error Counters\n");
+	seq_printf(s, "HW Error Count =		%14lld\n",
+		   vha->hw_err_cnt);
+	seq_printf(s, "Link Down Count =	%14lld\n",
+		   vha->short_link_down_cnt);
+	seq_printf(s, "Interface Err Count =	%14lld\n",
+		   vha->interface_err_cnt);
+	seq_printf(s, "Cmd Timeout Count =	%14lld\n",
+		   vha->cmd_timeout_cnt);
+	seq_printf(s, "Reset Count =		%14lld\n",
+		   vha->reset_cmd_err_cnt);
+	seq_puts(s, "\n");
+
+	list_for_each_entry(fcport, &vha->vp_fcports, list) {
+		if (!fcport || !fcport->rport)
+			continue;
+
+		seq_printf(s, "Target Num = %7d Link Down Count = %14lld\n",
+			   fcport->rport->number, fcport->tgt_short_link_down_cnt);
+	}
+	seq_puts(s, "\n");
+
 	return 0;
 }